聊天上传图片压缩，新增返回原图接口3

app/common/controller/Upload.php

@@ -100,7 +100,7 @@ class Upload extends BaseController
         $object='/'.ltrim($object,'/');
         // 压缩图片
         $compress_img = $file['compress_img'] ?? '';
-        if ($filecate == 'image' && empty($compress_img)) {
+        if ($filecate == 'image' && empty($compress_img) && $message) {
             $compress_img = $this->getCompressImg($object, $info['ext'], $prefix);
         }
         $ret = [